. Elements of botany. Botany; Botany. 240 ELEMENTS OF BOTANY. produces the urn or spore-capsule, and this is really a new plant. It remains attached to the parent plant and is nour- ished by it, does not grow to any considerable size, but develops a great number of Spores in its interior. These spores when fully formed are set free, germinate, and produce a thread- like protonema, which at length grows into the fully developed moss plant. The two generations, then, are the moss, with its rather complicated reproductive apparatus, and the urn,. Fig. 206. jB, protonema of Fwnaria hygrometrica, a
. Elements of botany. Botany; Botany. 240 ELEMENTS OF BOTANY. produces the urn or spore-capsule, and this is really a new plant. It remains attached to the parent plant and is nour- ished by it, does not grow to any considerable size, but develops a great number of Spores in its interior. These spores when fully formed are set free, germinate, and produce a thread- like protonema, which at length grows into the fully developed moss plant. The two generations, then, are the moss, with its rather complicated reproductive apparatus, and the urn,. Fig. 206. jB, protonema of Fwnaria hygrometrica, a mo^s ; h, a well-developed primary shoot; K, rudiment of a leaf-bearing axis, or ordinary moss plant, like Fig. 202 j w, a root-hair. (Magnified about 90 diameters.) destitute of such apparatus but filled with spores which are merely the product of continued cell-division in the interior of the spore-capsule. 298. Nutrition in Mosses. — Mosses, like the higher plants, draw their food supply partly in a liquid form from the earth and partly in a gaseous form from the air. It is interesting to notice, in passing, that one of the best plants with which. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1896
